Dr. Kekeru Goyu is a doctor in the Yu-Gi-Oh! first series anime.
The doctor had fired Nurse Miyuki, who had slapped him for his own neglect on Shizuka, in addition to countless other patients, who had all wound up dying. Jonouchi was forced to keep quiet about Goyu's anitcs, because if he went public about it, Shizuka would be kicked out of the hospital.
Faced with Jonouchi crying, Yugi was shocked and as such, Dark Yugi emerged and headed for the hospital. He confronted Goyu, with evidence of his corruption and negligence, and defeated him in a putt-putt game within the hospital. As his Penalty Game, Goyu was haunted by visions of the vengeful ghosts of his dead patients. Driven insane, Goyu laughed maniacally and admitted to the rest of the staff that he cares more for golf than his patients. He was fired afterwards.